Film cassette for several strip films

Abstract

The invention relates to a flat lightproof flexible film cassette for at least two photosensitive strip films suitable for taking several pictures, in which the strip films lie with their longitudinal edges one above the other and are arranged in the film cassette in such a way that after a first film strip has been exposed, the cassette is removed from the camera and, after rotation parallel to one of its axes (L, Q, V) may be re-inserted for exposing the next strip.

We claim: 
     
       1. A film cassette adapted to receive at least two photosensitive strip films each providing for a multiplicity of exposures and having perforation for film transport means on the camera side, said cassette consisting of a lightproof flat, flexible case of substantially the same length as said strip film, at least one cassette orifice arranged at an end face of the cassette and defined by said case and normal to the length of said case, with light sealing means in said orifice adapted to permit said strip film to pass from the lightproof case through the orifice to the exposure place in the camera and back into the case   and to receive said strip films so that they are arranged in said cassette with their longitudinal edges one above the other, said cassette being adapted to bring the perforation of the strip film successively into engagement with the transport mechanism of the camera to provide removal of a first strip film out of the cassette step by step for successive image exposure exterior to the cassette to receive the first strip reintroduced into the cassette after the last exposure and said case being so constructed and the strip film so arranged in the cassette that after the exposure of a first strip film the cassette is removable from the camera and rotatable parallel to one of its axis and   the cassette is adapted to provide for the removal of a next strip film from the cassette by engagement with the mechanism of the camera for advancement of the film for exterior exposure and subsequent reintroduction of the next strip film into the cassette.   
     
     
       2. A film cassette as claimed in claim 1, characterized in that one film orifice is provided in each end face of the film cassette and two identical film strips each having an emulsion, comprising at least one transport perforation at the beginning of the strip are provided and in that the emulsion sides face towards the same flat side of the film cassette and to expose the second strip film, the film cassette is rotatable after exposure of the first strip film about an axis running perpendicularly of the width and length of the film cassette. 
     
     
       3. A film cassette as claimed in claim 1, characterized in that two film orifices are arranged one above the other in one end face of the cassette and two film strips each with a cut-away portion at one end side and a perforation at the other side for transport purposes are provided and positioned in said cassette with their emulsion sides facing different flat sides of the cassette, adapted to provide engagement of the perforation of the film for the advancement of the respective film out and into the cassette and in that to expose the second strip film the cassette is turned about the axis running parallel to its longitudinal axis after exposure of the first strip film. 
     
     
       4. A film cassette as claimed in claim 1, characterized in that a film orifice is arranged in each end of the cassette face and two identical strip films are positioned in the cassette one above the other, each provided with at least one perforation for transport purposes and the emulsion sides of the strip films face towards the same, flat side of the film cassette and the cassette being adapted to turn about its transverse axis after exposure of the first strip film to expose the next one. 
     
     
       5. A film cassette adapted to receive at least two photosensitive strip films each providing for a multiplicity of exposures and having perforation for film transport means on the camera side, said cassette consisting of a light proof flat, flexible case of substantially the same length as said strip film,   two film orifices arranged at each end face of the cassette, said orifices being defined by said case and normal to the length of the case and the two orifices at each end arranged one above the other in the end face of the film cassette   in combination with   four identical strip films, with a cut-away portion at one end side and a perforation at the other side for transport purposes,   and positioned in said cassette with their emulsion side faces in pairs toward different flat sides of the cassette with light sealing means in said orifices adapted to permit said strip films to pass from the lightproof case through the orifices to the exposure place in the camera and back into the case   and to receive said strip films so that they are arranged in said cassette with their longitudinal edges one above the other, said cassette being adapted to bring the perforation of the strip films successively into engagement with the transport mechanism of the camera to provide removal of each strip film out of the cassette step by step for successive image exposure exterior to the cassette to receive said strip reintroduced into the cassette after the last exposure and said case being so constructed and the strip film so arranged in the cassette that after the exposure of said strip film the cassette is removable from the camera and rotatable parallel to one of its axis and   the cassette is adapted to provide for the removal of the next strip film from the cassette by engagement with the mechanism of the camera for advancement of the film for exterior exposure and subsequent reintroduction of the next strip film into the cassette.   
     
     
       6. A film cassette as claimed in claims 1 or 5, characterised in that the cassette and/or the strip films carry marks identifying the strip film sequence and direction and/or numbers for correct loading into a camera and the camera is provided with a corresponding mark at the loading slot and after removal of the cassette from the camera, the mark and/or numbers can be removed from the cassette or the strip films. 
     
     
       7. A film cassette as claimed in claims 1 or 5, characterised in that the cassette is filled with strip films which, in the vicinity of the first transport perforation, have only one narrow transport tag which is folded down or cut off by the camera during or after exposure and re-insertion of the strip film into the cassette so that a film cannot be transported again.